gdb/f-lang.c

   1 /* Fortran language support routines for GDB, the GNU debugger.
   2    Copyright 1993, 1994, 1996, 2000 Free Software Foundation, Inc.
   3    Contributed by Motorola.  Adapted from the C parser by Farooq Butt
   4    (fmbutt@engage.sps.mot.com).
   5
   6    This file is part of GDB.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 59 Temple Place - Suite 330,
  21    Boston, MA 02111-1307, USA.  */
  22
  23 #include "defs.h"
  24 #include "gdb_string.h"
  25 #include "symtab.h"
  26 #include "gdbtypes.h"
  27 #include "expression.h"
  28 #include "parser-defs.h"
  29 #include "language.h"
  30 #include "f-lang.h"
  31
  32 /* The built-in types of F77.  FIXME: integer*4 is missing, plain
  33    logical is missing (builtin_type_logical is logical*4).  */
  34
  35 struct type *builtin_type_f_character;
  36 struct type *builtin_type_f_logical;
  37 struct type *builtin_type_f_logical_s1;
  38 struct type *builtin_type_f_logical_s2;
  39 struct type *builtin_type_f_integer;
  40 struct type *builtin_type_f_integer_s2;
  41 struct type *builtin_type_f_real;
  42 struct type *builtin_type_f_real_s8;
  43 struct type *builtin_type_f_real_s16;
  44 struct type *builtin_type_f_complex_s8;
  45 struct type *builtin_type_f_complex_s16;
  46 struct type *builtin_type_f_complex_s32;
  47 struct type *builtin_type_f_void;
  48
  49 /* Following is dubious stuff that had been in the xcoff reader. */
  50
  51 struct saved_fcn
  52   {
  53     long line_offset;           /* Line offset for function */
  54     struct saved_fcn *next;
  55   };
  56
  57
  58 struct saved_bf_symnum
  59   {
  60     long symnum_fcn;            /* Symnum of function (i.e. .function directive) */
  61     long symnum_bf;             /* Symnum of .bf for this function */
  62     struct saved_bf_symnum *next;
  63   };
  64
  65 typedef struct saved_fcn SAVED_FUNCTION, *SAVED_FUNCTION_PTR;
  66 typedef struct saved_bf_symnum SAVED_BF, *SAVED_BF_PTR;
  67
  68 /* Local functions */
  69
  70 extern void _initialize_f_language PARAMS ((void));
  71 #if 0
  72 static void clear_function_list PARAMS ((void));
  73 static long get_bf_for_fcn PARAMS ((long));
  74 static void clear_bf_list PARAMS ((void));
  75 static void patch_all_commons_by_name PARAMS ((char *, CORE_ADDR, int));
  76 static SAVED_F77_COMMON_PTR find_first_common_named PARAMS ((char *));
  77 static void add_common_entry PARAMS ((struct symbol *));
  78 static void add_common_block PARAMS ((char *, CORE_ADDR, int, char *));
  79 static SAVED_FUNCTION *allocate_saved_function_node PARAMS ((void));
  80 static SAVED_BF_PTR allocate_saved_bf_node PARAMS ((void));
  81 static COMMON_ENTRY_PTR allocate_common_entry_node PARAMS ((void));
  82 static SAVED_F77_COMMON_PTR allocate_saved_f77_common_node PARAMS ((void));
  83 static void patch_common_entries PARAMS ((SAVED_F77_COMMON_PTR, CORE_ADDR, int));
  84 #endif
  85
  86 static struct type *f_create_fundamental_type PARAMS ((struct objfile *, int));
  87 static void f_printstr (struct ui_file * stream, char *string,
  88                         unsigned int length, int width,
  89                         int force_ellipses);
  90 static void f_printchar (int c, struct ui_file * stream);
  91 static void f_emit_char (int c, struct ui_file * stream, int quoter);
  92
  93 /* Print the character C on STREAM as part of the contents of a literal
  94    string whose delimiter is QUOTER.  Note that that format for printing
  95    characters and strings is language specific.
  96    FIXME:  This is a copy of the same function from c-exp.y.  It should
  97    be replaced with a true F77 version.  */
  98
  99 static void
 100 f_emit_char (c, stream, quoter)
 101      register int c;
 102      struct ui_file *stream;
 103      int quoter;
 104 {
 105   c &= 0xFF;                    /* Avoid sign bit follies */
 106
 107   if (PRINT_LITERAL_FORM (c))
 108     {
 109       if (c == '\\' || c == quoter)
 110         fputs_filtered ("\\", stream);
 111       fprintf_filtered (stream, "%c", c);
 112     }
 113   else
 114     {
 115       switch (c)
 116         {
 117         case '\n':
 118           fputs_filtered ("\\n", stream);
 119           break;
 120         case '\b':
 121           fputs_filtered ("\\b", stream);
 122           break;
 123         case '\t':
 124           fputs_filtered ("\\t", stream);
 125           break;
 126         case '\f':
 127           fputs_filtered ("\\f", stream);
 128           break;
 129         case '\r':
 130           fputs_filtered ("\\r", stream);
 131           break;
 132         case '\033':
 133           fputs_filtered ("\\e", stream);
 134           break;
 135         case '\007':
 136           fputs_filtered ("\\a", stream);
 137           break;
 138         default:
 139           fprintf_filtered (stream, "\\%.3o", (unsigned int) c);
 140           break;
 141         }
 142     }
 143 }
 144
 145 /* FIXME:  This is a copy of the same function from c-exp.y.  It should
 146    be replaced with a true F77version. */
 147
 148 static void
 149 f_printchar (c, stream)
 150      int c;
 151      struct ui_file *stream;
 152 {
 153   fputs_filtered ("'", stream);
 154   LA_EMIT_CHAR (c, stream, '\'');
 155   fputs_filtered ("'", stream);
 156 }
 157
 158 /* Print the character string STRING, printing at most LENGTH characters.
 159    Printing stops early if the number hits print_max; repeat counts
 160    are printed as appropriate.  Print ellipses at the end if we
 161    had to stop before printing LENGTH characters, or if FORCE_ELLIPSES.
 162    FIXME:  This is a copy of the same function from c-exp.y.  It should
 163    be replaced with a true F77 version. */
 164
 165 static void
 166 f_printstr (stream, string, length, width, force_ellipses)
 167      struct ui_file *stream;
 168      char *string;
 169      unsigned int length;
 170      int width;
 171      int force_ellipses;
 172 {
 173   register unsigned int i;
 174   unsigned int things_printed = 0;
 175   int in_quotes = 0;
 176   int need_comma = 0;
 177   extern int inspect_it;
 178   extern int repeat_count_threshold;
 179   extern int print_max;
 180
 181   if (length == 0)
 182     {
 183       fputs_filtered ("''", gdb_stdout);
 184       return;
 185     }
 186
 187   for (i = 0; i < length && things_printed < print_max; ++i)
 188     {
 189       /* Position of the character we are examining
 190          to see whether it is repeated.  */
 191       unsigned int rep1;
 192       /* Number of repetitions we have detected so far.  */
 193       unsigned int reps;
 194
 195       QUIT;
 196
 197       if (need_comma)
 198         {
 199           fputs_filtered (", ", stream);
 200           need_comma = 0;
 201         }
 202
 203       rep1 = i + 1;
 204       reps = 1;
 205       while (rep1 < length && string[rep1] == string[i])
 206         {
 207           ++rep1;
 208           ++reps;
 209         }
 210
 211       if (reps > repeat_count_threshold)
 212         {
 213           if (in_quotes)
 214             {
 215               if (inspect_it)
 216                 fputs_filtered ("\\', ", stream);
 217               else
 218                 fputs_filtered ("', ", stream);
 219               in_quotes = 0;
 220             }
 221           f_printchar (string[i], stream);
 222           fprintf_filtered (stream, " <repeats %u times>", reps);
 223           i = rep1 - 1;
 224           things_printed += repeat_count_threshold;
 225           need_comma = 1;
 226         }
 227       else
 228         {
 229           if (!in_quotes)
 230             {
 231               if (inspect_it)
 232                 fputs_filtered ("\\'", stream);
 233               else
 234                 fputs_filtered ("'", stream);
 235               in_quotes = 1;
 236             }
 237           LA_EMIT_CHAR (string[i], stream, '"');
 238           ++things_printed;
 239         }
 240     }
 241
 242   /* Terminate the quotes if necessary.  */
 243   if (in_quotes)
 244     {
 245       if (inspect_it)
 246         fputs_filtered ("\\'", stream);
 247       else
 248         fputs_filtered ("'", stream);
 249     }
 250
 251   if (force_ellipses || i < length)
 252     fputs_filtered ("...", stream);
 253 }
 254
 255 /* FIXME:  This is a copy of c_create_fundamental_type(), before
 256    all the non-C types were stripped from it.  Needs to be fixed
 257    by an experienced F77 programmer. */
 258
 259 static struct type *
 260 f_create_fundamental_type (objfile, typeid)
 261      struct objfile *objfile;
 262      int typeid;
 263 {
 264   register struct type *type = NULL;
 265
 266   switch (typeid)
 267     {
 268     case FT_VOID:
 269       type = init_type (TYPE_CODE_VOID,
 270                         TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 271                         0, "VOID", objfile);
 272       break;
 273     case FT_BOOLEAN:
 274       type = init_type (TYPE_CODE_BOOL,
 275                         TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 276                         TYPE_FLAG_UNSIGNED, "boolean", objfile);
 277       break;
 278     case FT_STRING:
 279       type = init_type (TYPE_CODE_STRING,
 280                         TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 281                         0, "string", objfile);
 282       break;
 283     case FT_CHAR:
 284       type = init_type (TYPE_CODE_INT,
 285                         TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 286                         0, "character", objfile);
 287       break;
 288     case FT_SIGNED_CHAR:
 289       type = init_type (TYPE_CODE_INT,
 290                         TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 291                         0, "integer*1", objfile);
 292       break;
 293     case FT_UNSIGNED_CHAR:
 294       type = init_type (TYPE_CODE_BOOL,
 295                         TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 296                         TYPE_FLAG_UNSIGNED, "logical*1", objfile);
 297       break;
 298     case FT_SHORT:
 299       type = init_type (TYPE_CODE_INT,
 300                         TARGET_SHORT_BIT / TARGET_CHAR_BIT,
 301                         0, "integer*2", objfile);
 302       break;
 303     case FT_SIGNED_SHORT:
 304       type = init_type (TYPE_CODE_INT,
 305                         TARGET_SHORT_BIT / TARGET_CHAR_BIT,
 306                         0, "short", objfile);   /* FIXME-fnf */
 307       break;
 308     case FT_UNSIGNED_SHORT:
 309       type = init_type (TYPE_CODE_BOOL,
 310                         TARGET_SHORT_BIT / TARGET_CHAR_BIT,
 311                         TYPE_FLAG_UNSIGNED, "logical*2", objfile);
 312       break;
 313     case FT_INTEGER:
 314       type = init_type (TYPE_CODE_INT,
 315                         TARGET_INT_BIT / TARGET_CHAR_BIT,
 316                         0, "integer*4", objfile);
 317       break;
 318     case FT_SIGNED_INTEGER:
 319       type = init_type (TYPE_CODE_INT,
 320                         TARGET_INT_BIT / TARGET_CHAR_BIT,
 321                         0, "integer", objfile);         /* FIXME -fnf */
 322       break;
 323     case FT_UNSIGNED_INTEGER:
 324       type = init_type (TYPE_CODE_BOOL,
 325                         TARGET_INT_BIT / TARGET_CHAR_BIT,
 326                         TYPE_FLAG_UNSIGNED, "logical*4", objfile);
 327       break;
 328     case FT_FIXED_DECIMAL:
 329       type = init_type (TYPE_CODE_INT,
 330                         TARGET_INT_BIT / TARGET_CHAR_BIT,
 331                         0, "fixed decimal", objfile);
 332       break;
 333     case FT_LONG:
 334       type = init_type (TYPE_CODE_INT,
 335                         TARGET_LONG_BIT / TARGET_CHAR_BIT,
 336                         0, "long", objfile);
 337       break;
 338     case FT_SIGNED_LONG:
 339       type = init_type (TYPE_CODE_INT,
 340                         TARGET_LONG_BIT / TARGET_CHAR_BIT,
 341                         0, "long", objfile);    /* FIXME -fnf */
 342       break;
 343     case FT_UNSIGNED_LONG:
 344       type = init_type (TYPE_CODE_INT,
 345                         TARGET_LONG_BIT / TARGET_CHAR_BIT,
 346                         TYPE_FLAG_UNSIGNED, "unsigned long", objfile);
 347       break;
 348     case FT_LONG_LONG:
 349       type = init_type (TYPE_CODE_INT,
 350                         TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT,
 351                         0, "long long", objfile);
 352       break;
 353     case FT_SIGNED_LONG_LONG:
 354       type = init_type (TYPE_CODE_INT,
 355                         TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT,
 356                         0, "signed long long", objfile);
 357       break;
 358     case FT_UNSIGNED_LONG_LONG:
 359       type = init_type (TYPE_CODE_INT,
 360                         TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT,
 361                         TYPE_FLAG_UNSIGNED, "unsigned long long", objfile);
 362       break;
 363     case FT_FLOAT:
 364       type = init_type (TYPE_CODE_FLT,
 365                         TARGET_FLOAT_BIT / TARGET_CHAR_BIT,
 366                         0, "real", objfile);
 367       break;
 368     case FT_DBL_PREC_FLOAT:
 369       type = init_type (TYPE_CODE_FLT,
 370                         TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,
 371                         0, "real*8", objfile);
 372       break;
 373     case FT_FLOAT_DECIMAL:
 374       type = init_type (TYPE_CODE_FLT,
 375                         TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,
 376                         0, "floating decimal", objfile);
 377       break;
 378     case FT_EXT_PREC_FLOAT:
 379       type = init_type (TYPE_CODE_FLT,
 380                         TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT,
 381                         0, "real*16", objfile);
 382       break;
 383     case FT_COMPLEX:
 384       type = init_type (TYPE_CODE_COMPLEX,
 385                         2 * TARGET_FLOAT_BIT / TARGET_CHAR_BIT,
 386                         0, "complex*8", objfile);
 387       TYPE_TARGET_TYPE (type) = builtin_type_f_real;
 388       break;
 389     case FT_DBL_PREC_COMPLEX:
 390       type = init_type (TYPE_CODE_COMPLEX,
 391                         2 * TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,
 392                         0, "complex*16", objfile);
 393       TYPE_TARGET_TYPE (type) = builtin_type_f_real_s8;
 394       break;
 395     case FT_EXT_PREC_COMPLEX:
 396       type = init_type (TYPE_CODE_COMPLEX,
 397                         2 * TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT,
 398                         0, "complex*32", objfile);
 399       TYPE_TARGET_TYPE (type) = builtin_type_f_real_s16;
 400       break;
 401     default:
 402       /* FIXME:  For now, if we are asked to produce a type not in this
 403          language, create the equivalent of a C integer type with the
 404          name "<?type?>".  When all the dust settles from the type
 405          reconstruction work, this should probably become an error. */
 406       type = init_type (TYPE_CODE_INT,
 407                         TARGET_INT_BIT / TARGET_CHAR_BIT,
 408                         0, "<?type?>", objfile);
 409       warning ("internal error: no F77 fundamental type %d", typeid);
 410       break;
 411     }
 412   return (type);
 413 }
 414 \f
 415
 416 /* Table of operators and their precedences for printing expressions.  */
 417
 418 static const struct op_print f_op_print_tab[] =
 419 {
 420   {"+", BINOP_ADD, PREC_ADD, 0},
 421   {"+", UNOP_PLUS, PREC_PREFIX, 0},
 422   {"-", BINOP_SUB, PREC_ADD, 0},
 423   {"-", UNOP_NEG, PREC_PREFIX, 0},
 424   {"*", BINOP_MUL, PREC_MUL, 0},
 425   {"/", BINOP_DIV, PREC_MUL, 0},
 426   {"DIV", BINOP_INTDIV, PREC_MUL, 0},
 427   {"MOD", BINOP_REM, PREC_MUL, 0},
 428   {"=", BINOP_ASSIGN, PREC_ASSIGN, 1},
 429   {".OR.", BINOP_LOGICAL_OR, PREC_LOGICAL_OR, 0},
 430   {".AND.", BINOP_LOGICAL_AND, PREC_LOGICAL_AND, 0},
 431   {".NOT.", UNOP_LOGICAL_NOT, PREC_PREFIX, 0},
 432   {".EQ.", BINOP_EQUAL, PREC_EQUAL, 0},
 433   {".NE.", BINOP_NOTEQUAL, PREC_EQUAL, 0},
 434   {".LE.", BINOP_LEQ, PREC_ORDER, 0},
 435   {".GE.", BINOP_GEQ, PREC_ORDER, 0},
 436   {".GT.", BINOP_GTR, PREC_ORDER, 0},
 437   {".LT.", BINOP_LESS, PREC_ORDER, 0},
 438   {"**", UNOP_IND, PREC_PREFIX, 0},
 439   {"@", BINOP_REPEAT, PREC_REPEAT, 0},
 440   {NULL, 0, 0, 0}
 441 };
 442 \f
 443 struct type **CONST_PTR (f_builtin_types[]) =
 444 {
 445   &builtin_type_f_character,
 446     &builtin_type_f_logical,
 447     &builtin_type_f_logical_s1,
 448     &builtin_type_f_logical_s2,
 449     &builtin_type_f_integer,
 450     &builtin_type_f_integer_s2,
 451     &builtin_type_f_real,
 452     &builtin_type_f_real_s8,
 453     &builtin_type_f_real_s16,
 454     &builtin_type_f_complex_s8,
 455     &builtin_type_f_complex_s16,
 456 #if 0
 457     &builtin_type_f_complex_s32,
 458 #endif
 459     &builtin_type_f_void,
 460     0
 461 };
 462
 463 /* This is declared in c-lang.h but it is silly to import that file for what
 464    is already just a hack. */
 465 extern int c_value_print (struct value *, struct ui_file *, int,
 466                           enum val_prettyprint);
 467
 468 const struct language_defn f_language_defn =
 469 {
 470   "fortran",
 471   language_fortran,
 472   f_builtin_types,
 473   range_check_on,
 474   type_check_on,
 475   f_parse,                      /* parser */
 476   f_error,                      /* parser error function */
 477   evaluate_subexp_standard,
 478   f_printchar,                  /* Print character constant */
 479   f_printstr,                   /* function to print string constant */
 480   f_emit_char,                  /* Function to print a single character */
 481   f_create_fundamental_type,    /* Create fundamental type in this language */
 482   f_print_type,                 /* Print a type using appropriate syntax */
 483   f_val_print,                  /* Print a value using appropriate syntax */
 484   c_value_print,                /* FIXME */
 485   {"", "", "", ""},             /* Binary format info */
 486   {"0%o", "0", "o", ""},        /* Octal format info */
 487   {"%d", "", "d", ""},          /* Decimal format info */
 488   {"0x%x", "0x", "x", ""},      /* Hex format info */
 489   f_op_print_tab,               /* expression operators for printing */
 490   0,                            /* arrays are first-class (not c-style) */
 491   1,                            /* String lower bound */
 492   &builtin_type_f_character,    /* Type of string elements */
 493   LANG_MAGIC
 494 };
 495
 496 void
 497 _initialize_f_language ()
 498 {
 499   builtin_type_f_void =
 500     init_type (TYPE_CODE_VOID, 1,
 501                0,
 502                "VOID", (struct objfile *) NULL);
 503
 504   builtin_type_f_character =
 505     init_type (TYPE_CODE_INT, TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 506                0,
 507                "character", (struct objfile *) NULL);
 508
 509   builtin_type_f_logical_s1 =
 510     init_type (TYPE_CODE_BOOL, TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 511                TYPE_FLAG_UNSIGNED,
 512                "logical*1", (struct objfile *) NULL);
 513
 514   builtin_type_f_integer_s2 =
 515     init_type (TYPE_CODE_INT, TARGET_SHORT_BIT / TARGET_CHAR_BIT,
 516                0,
 517                "integer*2", (struct objfile *) NULL);
 518
 519   builtin_type_f_logical_s2 =
 520     init_type (TYPE_CODE_BOOL, TARGET_SHORT_BIT / TARGET_CHAR_BIT,
 521                TYPE_FLAG_UNSIGNED,
 522                "logical*2", (struct objfile *) NULL);
 523
 524   builtin_type_f_integer =
 525     init_type (TYPE_CODE_INT, TARGET_INT_BIT / TARGET_CHAR_BIT,
 526                0,
 527                "integer", (struct objfile *) NULL);
 528
 529   builtin_type_f_logical =
 530     init_type (TYPE_CODE_BOOL, TARGET_INT_BIT / TARGET_CHAR_BIT,
 531                TYPE_FLAG_UNSIGNED,
 532                "logical*4", (struct objfile *) NULL);
 533
 534   builtin_type_f_real =
 535     init_type (TYPE_CODE_FLT, TARGET_FLOAT_BIT / TARGET_CHAR_BIT,
 536                0,
 537                "real", (struct objfile *) NULL);
 538
 539   builtin_type_f_real_s8 =
 540     init_type (TYPE_CODE_FLT, TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,
 541                0,
 542                "real*8", (struct objfile *) NULL);
 543
 544   builtin_type_f_real_s16 =
 545     init_type (TYPE_CODE_FLT, TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT,
 546                0,
 547                "real*16", (struct objfile *) NULL);
 548
 549   builtin_type_f_complex_s8 =
 550     init_type (TYPE_CODE_COMPLEX, 2 * TARGET_FLOAT_BIT / TARGET_CHAR_BIT,
 551                0,
 552                "complex*8", (struct objfile *) NULL);
 553   TYPE_TARGET_TYPE (builtin_type_f_complex_s8) = builtin_type_f_real;
 554
 555   builtin_type_f_complex_s16 =
 556     init_type (TYPE_CODE_COMPLEX, 2 * TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,
 557                0,
 558                "complex*16", (struct objfile *) NULL);
 559   TYPE_TARGET_TYPE (builtin_type_f_complex_s16) = builtin_type_f_real_s8;
 560
 561   /* We have a new size == 4 double floats for the
 562      complex*32 data type */
 563
 564   builtin_type_f_complex_s32 =
 565     init_type (TYPE_CODE_COMPLEX, 2 * TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT,
 566                0,
 567                "complex*32", (struct objfile *) NULL);
 568   TYPE_TARGET_TYPE (builtin_type_f_complex_s32) = builtin_type_f_real_s16;
 569
 570   builtin_type_string =
 571     init_type (TYPE_CODE_STRING, TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 572                0,
 573                "character string", (struct objfile *) NULL);
 574
 575   add_language (&f_language_defn);
 576 }
 577
 578 #if 0
 579 static SAVED_BF_PTR
 580 allocate_saved_bf_node ()
 581 {
 582   SAVED_BF_PTR new;
 583
 584   new = (SAVED_BF_PTR) xmalloc (sizeof (SAVED_BF));
 585   return (new);
 586 }
 587
 588 static SAVED_FUNCTION *
 589 allocate_saved_function_node ()
 590 {
 591   SAVED_FUNCTION *new;
 592
 593   new = (SAVED_FUNCTION *) xmalloc (sizeof (SAVED_FUNCTION));
 594   return (new);
 595 }
 596
 597 static SAVED_F77_COMMON_PTR
 598 allocate_saved_f77_common_node ()
 599 {
 600   SAVED_F77_COMMON_PTR new;
 601
 602   new = (SAVED_F77_COMMON_PTR) xmalloc (sizeof (SAVED_F77_COMMON));
 603   return (new);
 604 }
 605
 606 static COMMON_ENTRY_PTR
 607 allocate_common_entry_node ()
 608 {
 609   COMMON_ENTRY_PTR new;
 610
 611   new = (COMMON_ENTRY_PTR) xmalloc (sizeof (COMMON_ENTRY));
 612   return (new);
 613 }
 614 #endif
 615
 616 SAVED_F77_COMMON_PTR head_common_list = NULL;   /* Ptr to 1st saved COMMON  */
 617 SAVED_F77_COMMON_PTR tail_common_list = NULL;   /* Ptr to last saved COMMON  */
 618 SAVED_F77_COMMON_PTR current_common = NULL;     /* Ptr to current COMMON */
 619
 620 #if 0
 621 static SAVED_BF_PTR saved_bf_list = NULL;       /* Ptr to (.bf,function)
 622                                                    list */
 623 static SAVED_BF_PTR saved_bf_list_end = NULL;   /* Ptr to above list's end */
 624 static SAVED_BF_PTR current_head_bf_list = NULL;        /* Current head of above list
 625                                                          */
 626
 627 static SAVED_BF_PTR tmp_bf_ptr; /* Generic temporary for use
 628                                    in macros */
 629
 630 /* The following function simply enters a given common block onto
 631    the global common block chain */
 632
 633 static void
 634 add_common_block (name, offset, secnum, func_stab)
 635      char *name;
 636      CORE_ADDR offset;
 637      int secnum;
 638      char *func_stab;
 639 {
 640   SAVED_F77_COMMON_PTR tmp;
 641   char *c, *local_copy_func_stab;
 642
 643   /* If the COMMON block we are trying to add has a blank
 644      name (i.e. "#BLNK_COM") then we set it to __BLANK
 645      because the darn "#" character makes GDB's input
 646      parser have fits. */
 647
 648
 649   if (STREQ (name, BLANK_COMMON_NAME_ORIGINAL) ||
 650       STREQ (name, BLANK_COMMON_NAME_MF77))
 651     {
 652
 653       free (name);
 654       name = alloca (strlen (BLANK_COMMON_NAME_LOCAL) + 1);
 655       strcpy (name, BLANK_COMMON_NAME_LOCAL);
 656     }
 657
 658   tmp = allocate_saved_f77_common_node ();
 659
 660   local_copy_func_stab = xmalloc (strlen (func_stab) + 1);
 661   strcpy (local_copy_func_stab, func_stab);
 662
 663   tmp->name = xmalloc (strlen (name) + 1);
 664
 665   /* local_copy_func_stab is a stabstring, let us first extract the
 666      function name from the stab by NULLing out the ':' character. */
 667
 668
 669   c = NULL;
 670   c = strchr (local_copy_func_stab, ':');
 671
 672   if (c)
 673     *c = '\0';
 674   else
 675     error ("Malformed function STAB found in add_common_block()");
 676
 677
 678   tmp->owning_function = xmalloc (strlen (local_copy_func_stab) + 1);
 679
 680   strcpy (tmp->owning_function, local_copy_func_stab);
 681
 682   strcpy (tmp->name, name);
 683   tmp->offset = offset;
 684   tmp->next = NULL;
 685   tmp->entries = NULL;
 686   tmp->secnum = secnum;
 687
 688   current_common = tmp;
 689
 690   if (head_common_list == NULL)
 691     {
 692       head_common_list = tail_common_list = tmp;
 693     }
 694   else
 695     {
 696       tail_common_list->next = tmp;
 697       tail_common_list = tmp;
 698     }
 699 }
 700 #endif
 701
 702 /* The following function simply enters a given common entry onto
 703    the "current_common" block that has been saved away. */
 704
 705 #if 0
 706 static void
 707 add_common_entry (entry_sym_ptr)
 708      struct symbol *entry_sym_ptr;
 709 {
 710   COMMON_ENTRY_PTR tmp;
 711
 712
 713
 714   /* The order of this list is important, since
 715      we expect the entries to appear in decl.
 716      order when we later issue "info common" calls */
 717
 718   tmp = allocate_common_entry_node ();
 719
 720   tmp->next = NULL;
 721   tmp->symbol = entry_sym_ptr;
 722
 723   if (current_common == NULL)
 724     error ("Attempt to add COMMON entry with no block open!");
 725   else
 726     {
 727       if (current_common->entries == NULL)
 728         {
 729           current_common->entries = tmp;
 730           current_common->end_of_entries = tmp;
 731         }
 732       else
 733         {
 734           current_common->end_of_entries->next = tmp;
 735           current_common->end_of_entries = tmp;
 736         }
 737     }
 738 }
 739 #endif
 740
 741 /* This routine finds the first encountred COMMON block named "name" */
 742
 743 #if 0
 744 static SAVED_F77_COMMON_PTR
 745 find_first_common_named (name)
 746      char *name;
 747 {
 748
 749   SAVED_F77_COMMON_PTR tmp;
 750
 751   tmp = head_common_list;
 752
 753   while (tmp != NULL)
 754     {
 755       if (STREQ (tmp->name, name))
 756         return (tmp);
 757       else
 758         tmp = tmp->next;
 759     }
 760   return (NULL);
 761 }
 762 #endif
 763
 764 /* This routine finds the first encountred COMMON block named "name"
 765    that belongs to function funcname */
 766
 767 SAVED_F77_COMMON_PTR
 768 find_common_for_function (name, funcname)
 769      char *name;
 770      char *funcname;
 771 {
 772
 773   SAVED_F77_COMMON_PTR tmp;
 774
 775   tmp = head_common_list;
 776
 777   while (tmp != NULL)
 778     {
 779       if (STREQ (tmp->name, name) && STREQ (tmp->owning_function, funcname))
 780         return (tmp);
 781       else
 782         tmp = tmp->next;
 783     }
 784   return (NULL);
 785 }
 786
 787
 788 #if 0
 789
 790 /* The following function is called to patch up the offsets
 791    for the statics contained in the COMMON block named
 792    "name."  */
 793
 794 static void
 795 patch_common_entries (blk, offset, secnum)
 796      SAVED_F77_COMMON_PTR blk;
 797      CORE_ADDR offset;
 798      int secnum;
 799 {
 800   COMMON_ENTRY_PTR entry;
 801
 802   blk->offset = offset;         /* Keep this around for future use. */
 803
 804   entry = blk->entries;
 805
 806   while (entry != NULL)
 807     {
 808       SYMBOL_VALUE (entry->symbol) += offset;
 809       SYMBOL_SECTION (entry->symbol) = secnum;
 810
 811       entry = entry->next;
 812     }
 813   blk->secnum = secnum;
 814 }
 815
 816 /* Patch all commons named "name" that need patching.Since COMMON
 817    blocks occur with relative infrequency, we simply do a linear scan on
 818    the name.  Eventually, the best way to do this will be a
 819    hashed-lookup.  Secnum is the section number for the .bss section
 820    (which is where common data lives). */
 821
 822 static void
 823 patch_all_commons_by_name (name, offset, secnum)
 824      char *name;
 825      CORE_ADDR offset;
 826      int secnum;
 827 {
 828
 829   SAVED_F77_COMMON_PTR tmp;
 830
 831   /* For blank common blocks, change the canonical reprsentation
 832      of a blank name */
 833
 834   if ((STREQ (name, BLANK_COMMON_NAME_ORIGINAL)) ||
 835       (STREQ (name, BLANK_COMMON_NAME_MF77)))
 836     {
 837       free (name);
 838       name = alloca (strlen (BLANK_COMMON_NAME_LOCAL) + 1);
 839       strcpy (name, BLANK_COMMON_NAME_LOCAL);
 840     }
 841
 842   tmp = head_common_list;
 843
 844   while (tmp != NULL)
 845     {
 846       if (COMMON_NEEDS_PATCHING (tmp))
 847         if (STREQ (tmp->name, name))
 848           patch_common_entries (tmp, offset, secnum);
 849
 850       tmp = tmp->next;
 851     }
 852 }
 853 #endif
 854
 855 /* This macro adds the symbol-number for the start of the function
 856    (the symbol number of the .bf) referenced by symnum_fcn to a
 857    list.  This list, in reality should be a FIFO queue but since
 858    #line pragmas sometimes cause line ranges to get messed up
 859    we simply create a linear list.  This list can then be searched
 860    first by a queueing algorithm and upon failure fall back to
 861    a linear scan. */
 862
 863 #if 0
 864 #define ADD_BF_SYMNUM(bf_sym,fcn_sym) \
 865   \
 866   if (saved_bf_list == NULL) \
 867 { \
 868     tmp_bf_ptr = allocate_saved_bf_node(); \
 869       \
 870         tmp_bf_ptr->symnum_bf = (bf_sym); \
 871           tmp_bf_ptr->symnum_fcn = (fcn_sym);  \
 872             tmp_bf_ptr->next = NULL; \
 873               \
 874                 current_head_bf_list = saved_bf_list = tmp_bf_ptr; \
 875                   saved_bf_list_end = tmp_bf_ptr; \
 876                   } \
 877 else \
 878 {  \
 879      tmp_bf_ptr = allocate_saved_bf_node(); \
 880        \
 881          tmp_bf_ptr->symnum_bf = (bf_sym);  \
 882            tmp_bf_ptr->symnum_fcn = (fcn_sym);  \
 883              tmp_bf_ptr->next = NULL;  \
 884                \
 885                  saved_bf_list_end->next = tmp_bf_ptr;  \
 886                    saved_bf_list_end = tmp_bf_ptr; \
 887                    }
 888 #endif
 889
 890 /* This function frees the entire (.bf,function) list */
 891
 892 #if 0
 893 static void
 894 clear_bf_list ()
 895 {
 896
 897   SAVED_BF_PTR tmp = saved_bf_list;
 898   SAVED_BF_PTR next = NULL;
 899
 900   while (tmp != NULL)
 901     {
 902       next = tmp->next;
 903       free (tmp);
 904       tmp = next;
 905     }
 906   saved_bf_list = NULL;
 907 }
 908 #endif
 909
 910 int global_remote_debug;
 911
 912 #if 0
 913
 914 static long
 915 get_bf_for_fcn (the_function)
 916      long the_function;
 917 {
 918   SAVED_BF_PTR tmp;
 919   int nprobes = 0;
 920
 921   /* First use a simple queuing algorithm (i.e. look and see if the
 922      item at the head of the queue is the one you want)  */
 923
 924   if (saved_bf_list == NULL)
 925     internal_error ("cannot get .bf node off empty list");
 926
 927   if (current_head_bf_list != NULL)
 928     if (current_head_bf_list->symnum_fcn == the_function)
 929       {
 930         if (global_remote_debug)
 931           fprintf (stderr, "*");
 932
 933         tmp = current_head_bf_list;
 934         current_head_bf_list = current_head_bf_list->next;
 935         return (tmp->symnum_bf);
 936       }
 937
 938   /* If the above did not work (probably because #line directives were
 939      used in the sourcefile and they messed up our internal tables) we now do
 940      the ugly linear scan */
 941
 942   if (global_remote_debug)
 943     fprintf (stderr, "\ndefaulting to linear scan\n");
 944
 945   nprobes = 0;
 946   tmp = saved_bf_list;
 947   while (tmp != NULL)
 948     {
 949       nprobes++;
 950       if (tmp->symnum_fcn == the_function)
 951         {
 952           if (global_remote_debug)
 953             fprintf (stderr, "Found in %d probes\n", nprobes);
 954           current_head_bf_list = tmp->next;
 955           return (tmp->symnum_bf);
 956         }
 957       tmp = tmp->next;
 958     }
 959
 960   return (-1);
 961 }
 962
 963 static SAVED_FUNCTION_PTR saved_function_list = NULL;
 964 static SAVED_FUNCTION_PTR saved_function_list_end = NULL;
 965
 966 static void
 967 clear_function_list ()
 968 {
 969   SAVED_FUNCTION_PTR tmp = saved_function_list;
 970   SAVED_FUNCTION_PTR next = NULL;
 971
 972   while (tmp != NULL)
 973     {
 974       next = tmp->next;
 975       free (tmp);
 976       tmp = next;
 977     }
 978
 979   saved_function_list = NULL;
 980 }
 981 #endif